mongo::FineClock Class Reference

#include <fine_clock.h>

List of all members.

Public Types
typedef timespec	WallTime
Static Public Member Functions
static uint64_t	diffInNanos (WallTime end, WallTime start)
static WallTime	now ()

---

Detailed Description

This is a nano-second precision clock. We're skipping the harware TSC in favor of clock_gettime() which in some systems does not involve a trip to the OS (VDSO).

We're exporting a type WallTime that is and should remain opaque. The business of getting accurate time is still ongoing and we may change the internal representation of this class. (http://lwn.net/Articles/388188/)

Really, you shouldn't be using this class in hot code paths for platforms you're not sure whether the overhead is low.

Definition at line 39 of file fine_clock.h.

---

Member Typedef Documentation

typedef timespec mongo::FineClock::WallTime

Definition at line 42 of file fine_clock.h.

---

Member Function Documentation

static uint64_t mongo::FineClock::diffInNanos	(	WallTime	end,
		WallTime	start
	)			[inline, static]

Definition at line 50 of file fine_clock.h.

static WallTime mongo::FineClock::now

(

)

[inline, static]

Definition at line 44 of file fine_clock.h.

---

The documentation for this class was generated from the following file:

• fine_clock.h